I first met with their recruiter, who just got to know me a little (he reached out to me first). He set me up with a tech lead who asked me questions about how I would design Spotify's software (straightforward domain design questions). I was then interviewed by a director who asked me more design questions and what my career aspirations were. Then I interviewed with the CTO who asked me relatively detailed computer science questions. At no point did I write any code. Finally I chatted with the CEO, and then one more follow-up with the CTO. Then I got an email saying they decided to pass on me. When I asked why they'd take me through this whole long process, give me all positive feedback, and then decided not to hire me, they totally ghosted me, leaving me largely in the dark about "what's wrong with me".